1887291137 has 2 divisors, whose sum is σ = 1887291138. Its totient is φ = 1887291136.

The previous prime is 1887291103. The next prime is 1887291143. The reversal of 1887291137 is 7311927881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1795725376 + 91565761 = 42376^2 + 9569^2 .

It is an emirp because it is prime and its reverse (7311927881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1887291137 - 2¹² = 1887287041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1887291091 and 1887291100.

It is not a weakly prime, because it can be changed into another prime (1887291187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 943645568 + 943645569.

It is an arithmetic number, because the mean of its divisors is an integer number (943645569).

Almost surely, 2^1887291137 is an apocalyptic number.

It is an amenable number.

1887291137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1887291137 is an equidigital number, since it uses as much as digits as its factorization.

1887291137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 47.

The square root of 1887291137 is about 43442.9641829376. The cubic root of 1887291137 is about 1235.7946198287.

The spelling of 1887291137 in words is "one billion, eight hundred eighty-seven million, two hundred ninety-one thousand, one hundred thirty-seven".